Sheriff Arpaio's Posse On School Security

Sheriff Joe Arpaio has been using volunteer deputies for years. They're better known as the Joe Arpaio Volunteer Posse. Armed, the posse has helped the controversial sheriff on his immigration raids. Now, some of them have turned their attention to guarding schools in the wake of the Newton, CT shooting. Is this the answer to securing schools? What do we know about these volunteers?

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Fernanda Santos Phoenix Bureau Chief of The New York Times, covering Arizona and New Mexico.